What methods can ensure coordinated work of multiple threads in a multithreaded environment?

The following methods are used to ensure coordinated operation of multiple threads in a multithreaded environment:

• Synchronization (synchronized) — locking critical sections of code to prevent simultaneous access.
• Using classes from java.util.concurrent — for example, ReentrantLock, Semaphore, CountDownLatch.
• Volatile variables — to ensure visibility of variable changes between threads.
• Atomic operations — through classes like AtomicInteger, AtomicBoolean, etc.
• Using thread-safe collections — for example, ConcurrentHashMap.

Example of using synchronized:

public class Counter {
    private int count = 0;

    public synchronized void increment() {
        count++;
    }

    public synchronized int getCount() {
        return count;
    }
}